It applies to polyethylene, polypropylene and polyisobutylene plastics in the determination of the content of carbon. Its test result is obtained through the specimen under the nitrogen protection, after analyzing the weight of high temperature decomposition. This apparatus is easy to use, simple operation, reliable working, accurate measurement, automatic temperature control Standard:ISO 6964: Determination for the carbon black content of polyethylene pipes and fittings by calcination and pyrolysis ASTM D1603: Test Method for Carbon Black Content in Olefin Plastics IEC 60811-4-1: Common test methods for insulating and sheathing materials of electric and optical cables—Part 41:Methods specific to polyethylene and polypropylene compounds—Resistance to environmental stress cracking—Measurement of the melt flow index—Carbon black